A light guide plate for emergency lights

Abstract

This utility model relates to the field of light guide plate technology, specifically disclosing a light guide plate for an emergency light, comprising a light guide plate body. The upper and lower surfaces of the light guide plate body are respectively covered with an upper transparent flame-retardant film and a lower transparent flame-retardant film. A first polymer layer is disposed between the light guide plate body and the upper transparent flame-retardant film, and the first polymer layer is bonded to both the light guide plate body and the upper transparent flame-retardant film. A second polymer layer is disposed between the light guide plate body and the lower transparent flame-retardant film, and the second polymer layer is bonded to both the light guide plate body and the lower transparent flame-retardant film. Both the first and second polymer layers are copolymerized from styrene and butadiene. This utility model features high hardness, good impact resistance, long service life, and high reliability, thus avoiding abnormal phenomena such as cracking and deformation. Furthermore, it has low manufacturing costs and a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, and in particular to a light guide plate for emergency lights. Background Technology

[0002] Emergency signs are typically installed in fire lanes to indicate evacuation directions. These signs primarily utilize light guide plates to direct the light from LED bulbs to the marking holes on the sign's cover, thus displaying the emergency sign's symbol. Light guide plates are widely used across various industries.

[0003] Most existing light guide plates are fixed to the back cover of emergency warning lights with designated mounting positions. A small number of lights without such mounting positions require adhesive to secure the light guide plate to the back cover to prevent it from shifting. However, in actual use, after prolonged exposure to external impacts, the light guide plate may crack or deform due to insufficient strength, thus affecting the light guiding effect and the uniformity of the surface light source of the emergency warning light.

[0004] A search revealed that Chinese utility model patent CN202420266113.5 discloses a high-hardness light guide plate and its backlight module, aiming to solve the technical problem that the peripheral connection of the current light guide plate does not provide a buffering effect, causing the light guide plate to easily detach and lose its fixation after being impacted. The invention includes a back plate frame, within which a reflective sheet, a light guide plate body, a lower diffuser sheet, a prism sheet, an upper diffuser sheet, and an adhesive frame are arranged sequentially. It also includes a buffer structure located around the light guide plate body. The buffer structure includes a connecting frame; the four outer sides of the connecting frame are glued to the inner sidewall of the back plate frame. The light guide plate body is located within the connecting frame, and the outer side of the light guide plate body is connected to the inner side of the connecting frame via square spring A. This utility model has the advantage of using square spring A and square spring B to buffer the light guide plate body when it is impacted, improving the impact resistance of the light guide plate body, which is equivalent to indirectly increasing the hardness of the light guide plate body.

[0005] While the existing light guide plates can meet basic usage requirements, they require external frames and spring-loaded structures to improve their impact resistance, resulting in higher manufacturing costs and hindering widespread adoption, although they have a wider range of applications. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an emergency light guide plate that is highly durable, has good impact resistance, long service life, and high reliability, thereby avoiding abnormal phenomena such as cracking and deformation, achieving a good light guiding effect, and ensuring the uniformity of the surface light source; and it has a low manufacturing cost and a wide range of applications.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] An emergency light guide plate includes a light guide plate body. The upper and lower surfaces of the light guide plate body are respectively covered with an upper transparent flame-retardant film and a lower transparent flame-retardant film. A first polymer layer is disposed between the light guide plate body and the upper transparent flame-retardant film. The first polymer layer is bonded to both the light guide plate body and the upper transparent flame-retardant film. A second polymer layer is disposed between the light guide plate body and the lower transparent flame-retardant film. The second polymer layer is bonded to both the light guide plate body and the lower transparent flame-retardant film. Both the first polymer layer and the second polymer layer are copolymerized from styrene and butadiene.

[0009] Preferably, the light guide plate body has a substrate as the central plate, the bottom surface of the substrate has a light incident surface, and the top surface of the substrate has a light emitting surface.

[0010] Preferably, the upper surface of the light-emitting surface is provided with a diffuser, and the bottom surface of the light-incident surface is fixedly installed with a reflective film.

[0011] Preferably, both the first polymer layer and the second polymer layer have a plurality of adhesive holes, which are staggered in the thickness direction.

[0012] Preferably, the thickness of both the first and second polymer layers is 3mm-6mm, and the diameter of the adhesive holes is 2mm-4mm.

[0013] Preferably, both the upper transparent flame-retardant film and the lower transparent flame-retardant film are made of halogen-free flame-retardant PC film.

[0014] The present invention provides an emergency light guide plate with the following advantages: A first polymer layer is disposed between the light guide plate body and the upper transparent flame-retardant film. The first polymer layer is bonded to both the light guide plate body and the upper transparent flame-retardant film. A second polymer layer is disposed between the light guide plate body and the lower transparent flame-retardant film. The second polymer layer is bonded to both the light guide plate body and the lower transparent flame-retardant film. Both the first and second polymer layers are copolymerized from styrene and butadiene. By adding the first and second polymer layers, the overall hardness of the light guide plate is improved, resulting in high hardness, good impact resistance, long service life, and high reliability. This avoids cracking, deformation, and other abnormal phenomena, achieving a good light guiding effect and ensuring the uniformity of the surface light source. Furthermore, the manufacturing cost is low, and the application range is wide. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] In the figure, 1-light guide plate body, 2-upper transparent flame retardant film, 3-lower transparent flame retardant film, 4-first polymer layer, 5-second polymer layer, 6-light incident surface, 7-light emitting surface, 8-diffuser sheet, 9-reflective film, 10-bonding hole. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] like Figure 1As shown, the emergency light guide plate includes a light guide plate body 1. The upper and lower surfaces of the light guide plate body 1 are respectively covered with an upper transparent flame-retardant film 2 and a lower transparent flame-retardant film 3. A first polymer layer 4 is disposed between the light guide plate body 1 and the upper transparent flame-retardant film 2, and the first polymer layer 4 is bonded to both the light guide plate body 1 and the upper transparent flame-retardant film 2. A second polymer layer 5 is disposed between the light guide plate body 1 and the lower transparent flame-retardant film 3, and the second polymer layer 5 is bonded to both the light guide plate body 1 and the lower transparent flame-retardant film 3. Both the first polymer layer 4 and the second polymer layer 5 are copolymerized from styrene and butadiene. It is understood that the upper transparent flame-retardant film 2 and the lower transparent flame-retardant film 3 can be general-purpose halogen-free flame-retardant PC films, etc.

[0021] Specifically, the light guide plate body 1 has a substrate as its central plate. The bottom surface of the substrate has a light-incident surface 6, and the top surface of the substrate has a light-emitting surface 7. A diffuser 8 is provided on the upper surface of the light-emitting surface 7, and a reflective film 9 is fixedly installed on the bottom surface of the light-incident surface 6. It is understood that the substrate can be made of polystyrene or polymethyl methacrylate, etc. By setting the reflective film 9 and the diffuser 8, the light guide plate can have a stable light guiding effect. The substrate, the light-incident surface 6, and the light-emitting surface 7 are all hot-pressed, and the materials of the light-incident surface 6 and the light-emitting surface 7 can be general-purpose PC boards, etc.

[0022] Specifically, both the first polymer layer 4 and the second polymer layer 5 have a plurality of adhesive holes 10, which are staggered in the thickness direction; the thickness of both the first polymer layer 4 and the second polymer layer 5 is 3mm-6mm, and the diameter of the adhesive holes 10 is 2mm-4mm. It is understood that this impact-resistant emergency light guide plate can withstand a 0.35 to 0.7J spring impact hammer. When conducting impact strength testing, the light guide plate can first be placed at a preset temperature (55℃-65℃) for the test time, i.e., a high-temperature aging test is performed on the light guide plate. After the high-temperature aging test, an impact test is performed on the light guide plate, i.e., an external force is used to subject the light guide plate to a strong impact. Then, the light guide plate is checked for normal operation after the impact test, thus completing the impact strength test of the light guide plate.

[0023] Understandably, this utility model has a reasonable design and unique structure. By adding a first polymer layer 4 and a second polymer layer 5, the overall hardness of the light guide plate is improved. It has high hardness, good impact resistance, long service life, and high reliability, thereby avoiding abnormal phenomena such as cracking and deformation, achieving good light guiding effect, and ensuring the uniformity of the surface light source. In addition, the manufacturing cost is low and the application range is wide.

[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A fire-resistant emergency light guide plate, comprising a light guide plate body, wherein the upper and lower surfaces of the light guide plate body are respectively covered with an upper transparent flame-retardant film and a lower transparent flame-retardant film, characterized in that: A first polymer layer is disposed between the light guide plate body and the upper transparent flame retardant film. The first polymer layer is bonded to both the light guide plate body and the upper transparent flame retardant film. A second polymer layer is disposed between the light guide plate body and the lower transparent flame retardant film. The second polymer layer is bonded to both the light guide plate body and the lower transparent flame retardant film. Both the first polymer layer and the second polymer layer are copolymerized from styrene and butadiene.

2. The anti-panic light guide plate according to claim 1, wherein: The light guide plate body has a substrate as the central plate, the bottom surface of the substrate has a light incident surface, and the top surface of the substrate has a light emitting surface.

3. The anti-glare emergency light light guide plate of claim 2, wherein: The upper surface of the light-emitting surface is provided with a diffuser, and the bottom surface of the light-incident surface is fixedly installed with a reflective film.

4. The anti-glare emergency light light guide plate of claim 1, wherein: Both the first and second polymer layers have a plurality of adhesive holes, which are staggered in the thickness direction.

5. The anti-glare emergency light light guide plate of claim 4, wherein: The thickness of both the first and second polymer layers is 3mm-6mm, and the diameter of the adhesive holes is 2mm-4mm.

6. The emergency light guide plate according to claim 1, characterized in that: Both the upper and lower transparent flame-retardant films are made of halogen-free flame-retardant PC film.

Images